What is more likely, a culture renowned for its seafaring ability and resiliency on tiny islands exploring far beyond their homeland, or a group from a resource

What is more likely, a culture renowned for its seafaring ability and resiliency on tiny islands exploring far beyond their homeland, or a group from a resource rich continent leaving and reaching far despite their lack of experience with naval navigation and at-ocean life? I would put my money on the islanders being the explorers rather than the mainlanders.